编写程序提示用户输入日期，输出这天为星期几。

来源：互联网发布：阿里云磁盘io 编辑：程序博客网时间：2024/06/06 16:38
package judgeWeekday;import java.util.Scanner;public class JudgeWeekday {//参考点选择2014年1月1日星期三具有一定的特殊性；代码也与之有关。public static final int YEAR0 = 2014;//public static final int MONTH0 = 1; //public static final int DAY0 = 1;public static final int WEEKDAY0 = 3;public static final String week[]={"天","一","二","三","四","五","六"};public static final int leapmonthday[]={31,29,31,30,31,30,31,31,30,31,30,31};public static final int noleapmonthday[]={31,28,31,30,31,30,31,31,30,31,30,31};public static void main(String[] args) {Scanner console = new Scanner(System.in);System.out.print("input the date like 1983 3 29: "); int year = console.nextInt();int month = console.nextInt();int day = console.nextInt();boolean ynleap = judgeleap(year);int weekday = judgeWeekday (year,month,day,ynleap);System.out.println( year + "年" + month + "月" + day +"日是星期" + week[weekday]);}public static int judgeWeekday (int year,int month,int day,boolean ynleap){int sum = computeDaysDistance(year,month,day,ynleap);int weekday = getWeekday(sum,year);return weekday;}//计算输入输入日期与参考日期相隔的天数。public static int computeDaysDistance(int year,int month,int day,boolean ynleap){int sum = 0,sum1 = 0,sum2 = 0;if(year <  YEAR0){//计算sum1for(int i = year + 1;i <  YEAR0;i++){       if(judgeleap(i))       sum1 += 366;    else       sum1 += 365;}//计算sum2if(ynleap) {   sum2 = leapmonthday[month - 1]- day +1;  for(int j = month + 1;j <=12;j++)    sum2 += leapmonthday[j - 1]; } else {   sum2 = noleapmonthday[month -1]- day +1;  for(int j = month + 1;j <=12;j++)     sum2 += noleapmonthday[j - 1]; }}else{//计算sum1for(int i = YEAR0;i < year;i++) { if(judgeleap(i))       sum1 += 366;    else       sum1 += 365; }//计算sum2sum2 = day -1;    for(int j = 1;j <= month -1;j++)   {     if(ynleap)      sum2 += leapmonthday[j - 1];    else      sum2 += noleapmonthday[j -1];   }}//计算sumsum =sum1 + sum2;return sum;}//给与参考日期相隔的天数得到输入日期是星期几。public static int getWeekday(int sum,int year){int weekday = 0;if(year <  YEAR0) weekday = (WEEKDAY0 + 7 - (sum %7))%7;else weekday = (WEEKDAY0 + (sum % 7))%7;return weekday;}//判断给定的year是否闰年。public static boolean judgeleap(int year){ boolean ynleap;  if(((year % 4 ==0)&&(year % 100!= 0))||(year % 400 == 0))     ynleap = true;  else     ynleap = false;  return ynleap;}}//class
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